whitener

noun whit·en·er \ ˈhwīt-nər , ˈwīt- ; ˈhwī-tᵊn-ər , ˈwī- \

Definition of whitener

: one that whitens; specifically : an agent (such as a bleach) used to impart whiteness to something

First Known Use of whitener

1540

in the meaning defined above

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